A Congressman Wants to Measure the Level of Support in His

Essay

A congressman wants to measure the level of support in his district for campaign finance reform and wants to determine whether there is a gender gap with respect to this issue. One researcher suggests that they find separate confidence intervals for the percent of men and the percent of women who favor reform and then see if the intervals overlap. Another researcher suggests that they find a confidence interval for the difference in the proportions of men and women who favor reform. Which is the correct approach? Why?